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    "---------------------------------------------------------------------------\n",
    "* 日期：2022-10-26 / week10\n",
    "* 课程：python\n",
    "* 记录人：lin\n",
    "---------------------------------------------------------------------------"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 7,
   "id": "94423c42",
   "metadata": {},
   "outputs": [
    {
     "name": "stdout",
     "output_type": "stream",
     "text": [
      "0\n",
      "1\n",
      "2\n",
      "3\n"
     ]
    }
   ],
   "source": [
    "for i in range(4):\n",
    "    print(i)"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 24,
   "id": "087187de",
   "metadata": {},
   "outputs": [
    {
     "ename": "SyntaxError",
     "evalue": "invalid syntax (334632611.py, line 13)",
     "output_type": "error",
     "traceback": [
      "\u001b[1;36m  Input \u001b[1;32mIn [24]\u001b[1;36m\u001b[0m\n\u001b[1;33m    print(\"商品编号: \"+str(i)product_list[i])\u001b[0m\n\u001b[1;37m                         ^\u001b[0m\n\u001b[1;31mSyntaxError\u001b[0m\u001b[1;31m:\u001b[0m invalid syntax\n"
     ]
    }
   ],
   "source": [
    "product_list=[\n",
    "    [\"自行车\",299],\n",
    "    [\"Iphone 14 pro\",8000],\n",
    "    [\"NFT 盲盒\",28],\n",
    "    [\"许老师的python书\",\"80\"]\n",
    "]\n",
    "shopping_car=[]\n",
    "\n",
    "Alipay=input(\"请输入余额：\")\n",
    "while True:\n",
    "    print(\"------------商品列表---------------\")\n",
    "    for i in range(4):\n",
    "        print(\"商品编号: \"+str(i)product_list[i])\n",
    "    user_choice=input(\"请输入商品编号:\")\n",
    "    if user_chioce.isdigit():\n",
    "        # 情景1:用户输入了商品编号:shopping\n",
    "        if user_chioce.isdigit():\n",
    "            # 判断钱够不够，商品是谁？==> product_list[user_chioce][1]\n",
    "            if Alipay >= product_list[int(user_chioce)][1]\n",
    "            Alipay=Alipay-product_list[int(user_chioce)][1] # 买完商品剩余的钱\n",
    "            shopping_car.append(product_list[int(user_chioce)])\n",
    "        print(\"您购买的商品已加入购物车~~您的余额还有:\",Alipay)\n",
    "    else:\n",
    "        print(\"您的余额不足，请更换支付方式\")\n",
    "    if Alipay>商品的价格\n",
    "    # 情景2：用户输入\"q\",退出购买\n",
    "    elif user_chioce==\"q\":\n",
    "        print(\"您的购物车:\",shopping_car)\n",
    "        print(\"您的余额还有:\",Alipay)\n",
    "        break\n",
    "    else:\n",
    "        print(\"您输入的商品不存在或输入有误，请重新尝试\")"
   ]
  },
  {
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   "execution_count": null,
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